Development of a Quiet Aerofoil with Adaptive Porous Edges

在成功模仿自然流动控制的尝试之后，创新的新型流动控制诞生了。长期以来，猫头鹰一直是减少机翼噪音的一个令人兴奋的研究课题。在这种情况下，它们羽毛的孔隙度（允许空气阻力通过翅膀的质量）有助于抑制噪音[6,7]。如果这种噪声抑制可以利用而不会对机翼的空气动力学性能产生不利影响，它将具有重要的工业意义。机翼的多孔性处理是一个很有前途的研究课题，但目前的研究仍有许多空白，本博士的目标是填补：气动和气动声学性能，孔隙率/渗透率的适应性，以及机翼前缘和后缘的孔隙度

Following successful attempts to mimic flow controls employed by nature, innovative new flow controls were born. Owls have long been an exciting topic of research for reducing aerofoil noise. In this case, their feathers' porosity (the quality that allows air to pass resistively through the wings) helps in suppressing noise [6,7]. If this noise suppression could be harnessed without a detrimental effect to the aerodynamic performance of aerofoil, it would have significant industrial implications.Porous treatment on aerofoil is a promising research topic, but there are still many gaps in the current research which this PhD aims to fill:The Aerodynamic and Aero-acoustics PerformancesThe Adaptability of Porosity/PermeabilityPorosity at both the Leading and Trailing Edge of the aerofoil